CN202631043U - Formation gas volume measurement device of flexible package lithium ion battery - Google Patents

Formation gas volume measurement device of flexible package lithium ion battery Download PDF

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Publication number
CN202631043U
CN202631043U CN 201220141026 CN201220141026U CN202631043U CN 202631043 U CN202631043 U CN 202631043U CN 201220141026 CN201220141026 CN 201220141026 CN 201220141026 U CN201220141026 U CN 201220141026U CN 202631043 U CN202631043 U CN 202631043U
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CN
China
Prior art keywords
lithium ion
ion battery
container
measurement device
formation gas
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 201220141026
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Chinese (zh)
Inventor
陈宝华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningde Amperex Technology Ltd
Dongguan Amperex Technology Ltd
Original Assignee
Ningde Amperex Technology Ltd
Dongguan Amperex Technology Ltd
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Priority to CN 201220141026 priority Critical patent/CN202631043U/en
Application granted granted Critical
Publication of CN202631043U publication Critical patent/CN202631043U/en
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Expired - Lifetime legal-status Critical Current

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Abstract

The utility model belongs to the technical field of measurement devices and particularly relates to a formation gas volume measurement device of a flexible package lithium ion battery. The formation gas volume measurement device comprises a capacitor used for placing the battery, a pressure sensor placed at the bottom of the container, a reading device connected with the pressure sensor and a weighing device. The container is placed on the weighing device, and the cross section area of the lower portion of the container is larger than that of the upper portion of the container. Compared with the prior art, the measurement device greatly improves detection sensitivity and accuracy of volume change due to the fact that an object to be measured can be conveniently placed in the container, and the liquid level can be intuitively reflected at the extending position. Simultaneously, the measurement device converts liquid level change into pressure change, avoids deviation of visual inspection liquid level, is simple and audio-visual in operation due to the fact that sensitivity of the pressure sensor directly reflects sensitivity of volume measurement, has high measurement accuracy and is capable of achieving quick measurement of volume of formation gas of the flexible package lithium ion battery.

Description

A kind of flexible packing lithium ion battery formation gas volume measurement device
Technical field
The utility model belongs to the measurement mechanism technical field, relates in particular to a kind of flexible packing lithium ion battery formation gas volume measurement device.
Background technology
Lithium ion battery in the short more than ten years, has just obtained very fast development since last century, the nineties exploitation was come out.Lithium ion battery can be divided into flexible packing lithium ion battery, box hat lithium ion battery and aluminum hull lithium ion battery by its wrappage classification.Wherein, comparatively speaking, the energy density of flexible packing lithium ion battery is higher, cycle life is better, thereby enjoys favor.
Flexible packing lithium ion battery is the meeting aerogenesis in formation process, and gas production rate is the important parameter of reflection lithium ion battery formation process, measures this parameter and has vital role for analyzing the lithium ion battery formation process.Because the volumetric expansion of flexible packing material is irregular, gas production rate inconvenience is directly measured, but need measure by instrument.
Draining water gathering of gas law is a kind of common methods of traditional measurement irregularly shaped object volume.The principle of its foundation is following: in container, do not have the volume of object in the entry to equal the volume that liquid level rises to be increased.But this method has its limitation: because the cross-sectional area of container is bigger usually, it is less that volume change is reflected in the variable quantity of liquid level, is difficult for measuring accurately.And, adopt the method that the volume that overflows water calculates the volume of irregularly shaped object of measuring through object being inserted in the container of filling water, because capillary influence, the volume that overflows water is also inaccurate, therefore can not accurately measure the volume of irregularly shaped object.
In view of this, necessary a kind of device that can measure flexible packing lithium ion battery formation gas volume accurately, intuitively is provided.
The utility model content
The purpose of the utility model is: to the deficiency of prior art, and a kind of device that can measure flexible packing lithium ion battery formation gas volume accurately, intuitively is provided.
A kind of flexible packing lithium ion battery formation gas volume measurement device; Comprise the container that is used to place battery, the pressure transducer that is placed on said container bottom, the reading device that is connected with said pressure transducer; And meausring apparatus; Said container is placed on the said meausring apparatus, and the cross-sectional area of said container bottom is greater than the cross-sectional area on top.
Wherein, Container directly is formed by connecting cross-sectional area bigger container and the less tubular container of cross-sectional area; The liquid volume that makes the solid draining obtain changes in the less elongated tubular product such position embodiment of cross-sectional area; The small level change in big cross-sectional area position is changed into the bigger level change of small bore position, thereby realize more accurately embodying of volume change.
And, for fear of the error of range estimation level readings, improving measuring accuracy, the utility model also is converted into hydraulic pressure with liquid level change to be changed, through the direct reading of the pressure transducer that places container bottom.
As a kind of improvement of the utility model flexible packing lithium ion battery formation gas volume measurement device, this device also comprises water pump, and said water pump is provided with water pump controller, and said water pump controller is connected with meausring apparatus.
A kind of improvement as the utility model flexible packing lithium ion battery formation gas volume measurement device is connected with input channel and output channel on the said water pump.
As a kind of improvement of the utility model flexible packing lithium ion battery formation gas volume measurement device, the end of said output channel be positioned at said container directly over, be convenient to water filling in container.
As a kind of improvement of the utility model flexible packing lithium ion battery formation gas volume measurement device, said container is the inverted T-shaped container, and said inverted T-shaped container comprises integrated base portion and from the upwardly extending extension of base portion.
As a kind of improvement of the utility model flexible packing lithium ion battery formation gas volume measurement device, said extension is provided with scale, is convenient to reading.
As a kind of improvement of the utility model flexible packing lithium ion battery formation gas volume measurement device, but said base portion is provided with the gland bonnet of folding, is convenient to putting into and taking out of battery, and prevents the leakage of liquid.
As a kind of improvement of the utility model flexible packing lithium ion battery formation gas volume measurement device, the cross section of said extension is circular.
As a kind of improvement of the utility model flexible packing lithium ion battery formation gas volume measurement device, the diameter homogeneous of said extension is convenient to the mark of scale, and improves number of degrees precision.
As a kind of improvement of the utility model flexible packing lithium ion battery formation gas volume measurement device, the cross section of said base portion is circular or square.
The utility model is preferentially to fill the lower space principle in gravity direction position according to total liquid volume invariance principle and liquid; Design has the measurement mechanism of the flexible packing lithium ion battery formation gas volume of given shape; And bond quality conservation principle and fluid pressure and liquid level relative theory; The object under test volume change being changed into the liquid level position, and then change into the hydraulic pressure measurement, is the servicing unit that a kind of drainage combines hydraulic method measure solid volume change.
With respect to prior art; Adopt the measurement mechanism of the utility model; Testee can be inserted container easily, and can pass through the meausring apparatus reading, and the gross mass of twice measurement is constant before and after guaranteeing; And liquid level reflects in the extension position intuitively, has improved the detection sensitivity and the precision of volume change greatly.Simultaneously liquid level change is changed into pressure change; Avoided the deviation of range estimation liquid level, the sensitivity of pressure inductor directly reflects the sensitivity of cubing, simple and direct-viewing operation; Have higher measuring accuracy, can realize the quick measurement of the volume of flexible packing lithium ion battery formation gas.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model and useful technique effect thereof are elaborated, but the utility model is not limited to this.
As shown in Figure 1; A kind of flexible packing lithium ion battery formation gas of the utility model volume measurement device; Comprise the container 1 that is used to place battery 8, the pressure transducer 2 that is placed on said container 1 bottom, the reading device 3 that is connected with said pressure transducer 2; And meausring apparatus 4, said container 1 is placed on the said meausring apparatus 4, and the cross-sectional area of said container 1 bottom is greater than the cross-sectional area (this embodiment is that the inverted T-shaped container is an example with container 1) on top.
Wherein, Container 1 directly is connected with the less tubular container of cross-sectional area by the bigger container of cross-sectional area; The liquid volume that makes the solid draining obtain changes in the less elongated tubular product such position embodiment of cross-sectional area; The small level change in big cross-sectional area position is changed into the bigger level change of small bore position, thereby realize more accurately embodying of volume change.
And, for fear of the error of range estimation level readings, improving measuring accuracy, the utility model also is converted into hydraulic pressure with liquid level change to be changed, and the pressure transducer 2 direct readings through placing container bottom can be accurate to 0.001mL.Through following conversion relation, can hydraulic pressure be changed being converted into volume change.
Pressure inductor is stressed to be T, and the pressure transducer area is S A, the elongated tubular cross section of inboard wall is long-pending to be S 0, fluid density is ρ, and liquid level is h, and volume change is delta V, then:
T=ρghS A
T 1=ρgh 1S A
T 2=ρgh 2S A
ΔT=ρg(h 2-h 1)S A
ΔV=(h 2-h 1)S 0
ΔV = S 0 ρg S A ΔT
Wherein, this device also comprises water pump 5, and said water pump 5 is provided with water pump controller 51, and said water pump controller 51 is connected with meausring apparatus 4.
Be connected with input channel 6 and output channel 7 on the said water pump 5.
The end of said output channel 7 be positioned at said inverted T-shaped container directly over, be convenient to water filling in the inverted T-shaped container.The inverted T-shaped container places on the meausring apparatus 4, can guarantee that twice measurement gross mass is constant, has eliminated liquid and has sticked in the error that the measured object surface produces.Meausring apparatus 4 is connected with water pump controller 51, changes in the forward direction inverted T-shaped container to inject certain amount of fluid, and meausring apparatus 4 recording quality readings are m, and this moment, pressure transducer 2 readings were T 1After changing into, set water pump controller 51, when meausring apparatus 4 readings reached m, water pump controller 51 switched off the pump 5, stopped to add liquid, guaranteed to change into the back gross mass and still was m, and this moment, pressure transducer 2 readings were T 2Through twice pressure sensor readings can converse change into before and after volume of battery change.
Said inverted T-shaped container comprises integrated base portion 11 and from base portion 11 upwardly extending extensions 12.
Said extension 12 is provided with scale, is convenient to reading.
But said base portion 11 is provided with the gland bonnet of folding, is convenient to putting into and taking out of battery.
The cross section of said extension 12 is circular.
The diameter homogeneous of said extension 12 is convenient to the mark of scale.
The cross section of said base portion 11 is circular or square.
In the actual use; Open the gland bonnet of inverted T-shaped container earlier; The battery (touching lug with adhesive tape) that do not change into to be measured is inserted in the base portion 11; In the inverted T-shaped container, pour into the water (volume of water guarantees that liquid level reaches extension 12 positions) of certain volume, the reading m of record meausring apparatus 4 this moment and the reading T1 of pressure inductor 2.
After battery 8 changes into; Battery after changing into 8 (adhesive tape of quality such as using to touch lug) is inserted in the base portion 11, and 5 foldings of water pump controller 51 control water pumps add the water of certain volume in the inverted T-shaped container; Guarantee that the reading of meausring apparatus 4 is m this moment, the reading T2 of record pressure inductor 2.
The density of water is ρ, and the area of pressure transducer 2 is S A, the cross-sectional area of extension 12 is S 0, electric core volume changes before and after then can obtaining changing into:
ΔV = S 0 ρg S A ΔT = S 0 ρg S A ( T 2 - T 1 )
In a word; The utility model is preferentially to fill the lower space principle in gravity direction position according to total liquid volume invariance principle and liquid; Design has the measurement mechanism of the flexible packing lithium ion battery formation gas volume of given shape, and bond quality conservation principle and fluid pressure and liquid level relative theory, and the object under test volume change is changed into the liquid level position; And then change into the hydraulic pressure measurement, be the servicing unit that a kind of drainage combines hydraulic method measure solid volume change.
With respect to prior art; Adopt the measurement mechanism of the utility model; Testee can be inserted the inverted T-shaped container easily, and can pass through meausring apparatus 4 readings, and the gross mass of twice measurement is constant before and after guaranteeing; And liquid level reflects in extension 12 positions intuitively, has improved the detection sensitivity and the precision of volume change greatly.Simultaneously liquid level change is changed into pressure change, avoided the deviation of range estimation liquid level, the sensitivity of pressure transducer 2 directly reflects the sensitivity of cubing, and simple and direct-viewing operation has higher measuring accuracy.
Meausring apparatus in the utility model can be electronic balance, also can be other balances.
According to the announcement and the guidance of above-mentioned instructions, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the embodiment that discloses and describe above the utility model is not limited to is in the protection domain of the claim that also should fall into the utility model to some modifications and the change of the utility model.In addition, although used some specific terms in this instructions, these terms are explanation for ease just, the utility model is not constituted any restriction.

Claims (10)

1. flexible packing lithium ion battery formation gas volume measurement device; It is characterized in that: comprise the container that is used to place battery, the pressure transducer that is placed on said container bottom, the reading device that is connected with said pressure transducer; And meausring apparatus; Said container is placed on the said meausring apparatus, and the cross-sectional area of said container bottom is greater than the cross-sectional area on top.
2. flexible packing lithium ion battery formation gas volume measurement device according to claim 1 is characterized in that: also comprise water pump, said water pump is provided with water pump controller, and said water pump controller is connected with meausring apparatus.
3. flexible packing lithium ion battery formation gas volume measurement device according to claim 2 is characterized in that: be connected with input channel and output channel on the said water pump.
4. flexible packing lithium ion battery formation gas volume measurement device according to claim 3 is characterized in that: the end of said output channel be positioned at said container directly over.
5. flexible packing lithium ion battery formation gas volume measurement device according to claim 1 is characterized in that: said container is the inverted T-shaped container, and said inverted T-shaped container comprises integrated base portion and from the upwardly extending extension of base portion.
6. flexible packing lithium ion battery formation gas volume measurement device according to claim 5, it is characterized in that: said extension is provided with scale.
7. flexible packing lithium ion battery formation gas volume measurement device according to claim 5 is characterized in that: but said base portion is provided with the gland bonnet of folding.
8. flexible packing lithium ion battery formation gas volume measurement device according to claim 5 is characterized in that: the cross section of said extension is for circular.
9. flexible packing lithium ion battery formation gas volume measurement device according to claim 8 is characterized in that: the diameter homogeneous of said extension.
10. flexible packing lithium ion battery formation gas volume measurement device according to claim 5 is characterized in that: the cross section of said base portion is for circular or square.
CN 201220141026 2012-04-06 2012-04-06 Formation gas volume measurement device of flexible package lithium ion battery Expired - Lifetime CN202631043U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220141026 CN202631043U (en) 2012-04-06 2012-04-06 Formation gas volume measurement device of flexible package lithium ion battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220141026 CN202631043U (en) 2012-04-06 2012-04-06 Formation gas volume measurement device of flexible package lithium ion battery

Publications (1)

Publication Number Publication Date
CN202631043U true CN202631043U (en) 2012-12-26

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103674768A (en) * 2013-11-22 2014-03-26 深圳市迪凯特电池科技有限公司 Gas production amount detection method and measuring device during lithium ion battery formation
CN104880232A (en) * 2015-05-27 2015-09-02 深圳市动力聚能科技有限公司 Flexible package lithium-ion battery formation gas production rate testing device and using method thereof
CN106949943A (en) * 2017-03-15 2017-07-14 湖北工程学院 Gas volume measurement apparatus and fuel cell module
CN111256629A (en) * 2020-03-03 2020-06-09 元能科技(厦门)有限公司 Instrument and method for measuring volume change of battery cell

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103674768A (en) * 2013-11-22 2014-03-26 深圳市迪凯特电池科技有限公司 Gas production amount detection method and measuring device during lithium ion battery formation
CN104880232A (en) * 2015-05-27 2015-09-02 深圳市动力聚能科技有限公司 Flexible package lithium-ion battery formation gas production rate testing device and using method thereof
CN106949943A (en) * 2017-03-15 2017-07-14 湖北工程学院 Gas volume measurement apparatus and fuel cell module
CN111256629A (en) * 2020-03-03 2020-06-09 元能科技(厦门)有限公司 Instrument and method for measuring volume change of battery cell

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Granted publication date: 20121226

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